In my application, i have put a question on form closing if the user wants to save the changes?. But right now, i have just put it in default whether they make changes or not.I thought of prompting it on text change.. but the text automatically changes on load as it retrieves data from sql server.
View 15 RepliesI have a form with a tabcontrol. Each tab has a formview for adding/updating data. The user could have multiple formviews open at once. I would like a way to prompt the user to save if they are leaving the screen.[code]...
View 3 RepliesI wanted to know how my users can write something in a textbox, then allow them to save it as a .txt file.
View 16 Repliesi am using vb.net with asp.nethow am i going to check that this class has 10 people already if i continue adding the 11 one it should prompt me that the class is full once i click save button, i know is something like validating but not sure howi can first add a few student to class 2A and later on continue with adding to another class however, when i return to add more student into 2A and save, it should help to check like what i mention above i have this table call listOfStudent
listID class student registerNo
1 2A A 123
2 2A B 456
3 2B C 789
i have a aspx web page, i have a drop down list where i select the class
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when enter finish the first row of student data, user can click on the addNewRowButton to add a second row of student data and so on, then after all is done when the user click saveAllStudentDatabutton, it should check whether this class i selected from drop down list has already has 10 student if it does it prompt if it don't it will add in
I am utilizing a webbrowser control in vb.net 2005 to display excel workbooks
We are using this control to open excel documents. Webbrowser.ShowSaveAsDialog() allows the user to save the excel workbook open at any location he wants
However, I don't want the user to decide where to save. Is there any way to save an excel document from the webbrowser control without going through the ShowSaveAsDialog?
On closing of webbrowser, a simple prompt to user whether he/she would like to save changes should be fine enough
As of now, I can close webbrowser control and it does not prompt the user to save the changes. Actually, all changes are lost until and unless I perform a save (Ctrl+S) manually
What is the code that I can use to describe what happens when there is not just one exception in a'Try...Catch..Finally...End Try' statement? For example: 'Catch' is used to describe what happens when a certain exception occurs, but what can I use to describe what happens when a certain exception does NOT occur?
View 11 RepliesIs there some interface I can implement to allow basic comparisons and math to happen as it would an integer?
For example, let's say I have the following class:
Public Class Something
Public SomeBigNumber as UInt64
End Class
I would like to do something like this:
Dim SomethingA, SomethingB, SomethingC as New Something
....
If (SomethingA-SomethingB) > SomethingC Then
'Do stuff
End If
I was hoping to be able to implement some interface (if that is even the right term for it) that would return the UInt64 contained in the class for comparison and math, if possible.
me and a partner need to play sounds when certain events occur, however, every method we try..
My.Computer.Audo.Play("file.wav")
or?
Sound.PlayWaveFile("file.wav") from this class: http:[url]....etc they all don't work
They do NOT throw any exceptions, they just dont play the music, the test demo of the Sound Class works like a charm, its just not working in our project..same with My.Computer. Audio. Play.what could we have done to make it so that we can't play sounds from our application?
PS: this problem occurs on all of the computers we test it on, yet the normal sound-playing methods seem to work on all of those computers when they are implemented in other projects.. its just not working in these instances
Private Sub done_Click(ByVal sender As Object, ByVal e As System.Windows.RoutedEventArgs) Handles done.Click
Dim s As Integer = ComboBox1.SelectedIndex
Dim t As Integer = ComboBox2.SelectedIndex
Dim x As Integer
[code].....
When i go for r <> 0 then it occur twice.
Here is my drop down list and data source. My question is.. when is it possible to set a defaulted selected option for the drop down list, aka when have all the dropdownlists been databound and their ListItems populated? I have tried Page_PreRender, age_PreRenderComplete, Page_Load.I have read over MSDN's Page Life cycle event which suggest Page_PreRender.
<asp:DropDownList ID="ddlRampStandard" runat="server"
DataSourceID="RampStandardDataSource" DataTextField="StandardName"
DataValueField="StandardName" RepeatDirection="Horizontal"
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I am making a program that is sort of a frontend to all my other apps. I put the EXEs of those apps into the resources of my frontend. The problem occurs when I try to run the EXEs from memory.
I keep getting System.Reflection.TargetInvocationException on the line:
entryPoint.Invoke(RuntimeHelpers.GetObjectValue(objectValue), New Object() {New String() {"1"}})
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I am trying to create a background worker that will spawn a dialog, while a long event is occurring. For example, when the main thread in trying to connect connect to a db and update a large amount of records, I would like to have the background worker spawn a dialog that advises the user to "Please Wait"
Here is what I have so far
1. I create a background worker using the drag and drop
2. Before the event that taking a long time starts I call:
Me.BackgroundWorker1.RunWorkerAsync()
BackgroundWorker1.WorkerReportsProgress = True
3. This is the events for the bgworker, all of which was enabled in the form designer:
Private Delegate Sub delCreateNewForm()
Private Sub BackgroundWorker1_DoWork(ByVal sender As System.Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker1.DoWork
Dim d As New delCreateNewForm(AddressOf CreateNewForm)
Me.Invoke(d)
[Code] .....
4. When the long activity is completed I call this:
BackgroundWorker1.ReportProgress(0)
Everything seems to work fine, except that the newly spawned dialog in no responsive and appears to be frozen, until its closed by the Progress Changed event.
If I change something in my visual basic, and start debugging, nothing changes to the program I made. Wether I save or not, it's just always the same.
Secondly, I would be very glad if somebody could give me the codes for a
"Create User" button. So it saves in C:Program FilesAcc.txt
And if you created one, you can login with it after that.
how do I refer to a panel. i,e. i have 5 panels in total, and based on specific inputs , i want changes to occur in specific panels(each stored in a tab). So, now how do i give the control to the rspective panel ??
View 1 Replieshow can you schedule a task in VB application to occur only in 24 hours. let's say every 11:25pm
View 1 RepliesI have a DataGridView control in my windows form application. What i want to do is this: I want to reload the view so that it shows the correct data when a change occur to the database table that it is bound. In other words, when i delete a record, using an sql query not the DataGridView1.Rows.Remove(DataGridView1.CurrentRow) property, i want the changes to occur to the datagridview also. For example: I have a customers table that is bound to the datagridview. When i delete a record, lets say the one with ID=5, i want the row to be removed from the gridview in run-time. Is this possible?
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[code]Is it necessary to close object when exception occurs? if yes please correct above code i m confused where to close the response object
View 3 Repliesi want to know what are the methods in order for me to extract the information that is stored in the exception. i also would like to know how do i extract the code line that caused the exception to occur.
View 6 RepliesI have made an app that the user has to type a number, and i want the process for the app to do this how evermany times the user wishes it to do.
for example, the app is ment to create a line in a text document, so they write in textbox1 what they want written on the line, and then in textbox2, tey say how many lines they want to create.
So,
TextBox1.Text = "BLAA"
TextBox2.Text = "782"
It will create 782 lines of BLAA. not just one...
When I publish the program. Is there any way to get VB to publish the text files with the program so that no errors can occur. When I install and run the published program I get a series of errors relating to text files that are not found.
View 4 Repliestoday I finished my VB project which is a program that generates costs of pizza's by what the customer order. The code is all complete just looking for some idea's on to stop bugs and clean up the code. So below is all my code and picture of the form. Errors occur when someone doesn't pick a value, so what i want is there to be default values as 0.
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The user has been running the app in question for over a year with no issues like this (this is a VB2008 business/database application with an executable 4.6 MB in size). Starting last week, "all of a sudden", the user started getting INTERMITTENT error messages like the following:
Exception has been thrown by the target of an invocation.
Creation of the ImageList handle did not succeed.
Out of memory.
Parameter is not valid.
The last two have been accompanied by the big "red cross" on the form (in the screen shots the user sent me).The fact that the one message mentions "ImageList" and poking around on the Internet for answer on "Parameter not valid" points in the direction of a graphic problem, but nothing has changed in this area for a long time, and the app only uses graphics in a very straightforward way, using images on buttons and menu items, but not doing any in-line graphics methods.
To get the row index of DataGrid when change(asp:radiobuttonlist) occur in row of the TemplateColumn
<asp:DataGrid ID="dgTier2" runat="server" AutoGenerateColumns="False" Width="578px"
Height="83px" OnItemDataBound="dgTier2_ItemDataBound">
<asp:BoundColumn DataField="TypeID" HeaderText="TypeID">
</asp:BoundColumn>
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After changing the rediobutton selection to get the Rowindex of the changed row.if at all change happens in many rows i need make the collection of the Rowindexs.
Background: I wrote code that will output all the currently logged in User's Active Directory group names. I want the group name (ex: Acomp_user_BIG) via IdentityReference.Translate instead of the current user's SID's (ex: S-1-5-32-544) returned via IdentityReference.Value.
Here is code that I used:
Public ReadOnly Property Groups As IdentityReferenceCollection
Get
Dim irc As IdentityReferenceCollection
[Code].....
Private Sub cmbEmployee_Validating(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles cmbEmployee.Validating
[code]...
I've written a keydown event that needs to occur multiple times during the execution of a program, and it needs to play a sound each time. The first time the keydown event is triggered, the sound plays without a hitch. However, the second time (and all subsequent times) the keydown event is triggered, a system beep accompanies the sound. I'm using Studio Express '10 and I've already integrated e.SuppressKeyPress into my code:
[Code]...
In my windows application, I want to check which part of code (or routine) has caused un-handled exception event to occur from application events in its running mode (not debugging).
If this is possible then please guide me how to do this.
If any clarification regarding this is required,
I have this code:
Public Class Beryllium
Public Const AtomicNumber As Byte = 4
Public Const Symbol As String = "Be"
[Code]....
I want to make a list out of all the constants (AtomicNumber, Symbol, Name and AtomicMass). I want to make the list also a constant. When I run the code above, I get an error highlighting AtomicNumber (on line on which I commented on "This line"). I tried .ToString() and CStr() but I get errors on both. Maybe there is a different way to make these constants one string or list (must be public and have new lines)?
I tried to start using VB 2010 Express with a program I originally developed with VB 2005 Express that I moved to VB 2008 Express successfully a couple years ago. It uses a database file (*.mdf) that is on the computer ( not out on a server). When attempt to run the program in debug mode, I get the following error "An attempt to attach an auto-named database for file C:Documents and SettingsTomMy DocumentsQuizzing StuffQuestion Database 2010QuizQuest ionGameQuizQuestionGameinReleaseQuizQuestionDB.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share."
I first made a copy of the entire project folder that was working in VB 2008 Express and gave it a different name. In VB2010 I opened the project in the copied folder and it said it successfully converted the project. I am able to open the Data Source inthe Designer and see the database structure as I expect. I think the project is still using SQL Server 2005 Express (because it is what is checked in the list of prerequisites on the Publish tab).
Note, I have programmed off and on for many years, but fairly new to using databases and SQL Server.
Quick query...I'm trying to scan a long string and return any values that occur between the tags <FileName> and </FileName> I've got a bit of code here to use regular expressions to return the position of the occurunces of both substrings..Just wanted to find out if there is any way to scan for both substrings within one loop (as im currently doing 2, one for the first substring and one for the 2nd) so I can use something along these lines:
ringlist = Mid(XMLRESP, (startloc + 1), (endloc - 1))
MsgBox(ringlist)
to msg box the value between the substrings...either that or another approach to return the value between the 2 substrings (it can be of variable length)
Dim patternstart As String = "<FileName>"
Dim patternend As String = "</FileName>"
Dim matchesstart As MatchCollection = Regex.Matches(XMLRESP, patternstart)
[code].....